Results 1 to 10 of about 22,607 (113)

Entropy and Mixing Entropy for Weakly Nonlinear Mechanical Vibrating Systems [PDF]

open access: yesEntropy, 2019
In this paper, we examine Khinchin’s entropy for two weakly nonlinear systems of oscillators. We study a system of coupled Duffing oscillators and a set of Henon−Heiles oscillators. It is shown that the general method of deriving the Khinchin&
Zahra Sotoudeh
doaj   +2 more sources

Impact of Magnetohydrodynamics on Thermal Mixing Efficiency and Entropy Generation Analysis Passing Through a Micromixer Using Non-Newtonian Nanofluid [PDF]

open access: yesMicromachines
The present paper investigates the steady laminar flow and thermal mixing performance of non-Newtonian Al2O3 nanofluids within a two-layer cross-channel micromixer, employing three-dimensional numerical simulations to solve the governing equations across
Naas Toufik Tayeb   +5 more
doaj   +2 more sources

Elucidating the Role of the Mixing Entropy in Equilibrated Nanoconfined Reactions [PDF]

open access: yesEntropy
By introducing the concept of nanoreaction-based fluctuating mixing entropy, the challenge posed by the smallness of a closed molecular system is addressed through equilibrium statistical–mechanical averaging over fluctuating reaction extent.
Leonid Rubinovich, Micha Polak
doaj   +2 more sources

Surface topology of mixing entropy after two-pulse laser ablation of stainless steel

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2023
The paper presents experiments on crystallization from a melt with an analysis of the morphology of the emerging crystal structures, showing examples of the formation of dendritic crystals.
D.D. Tumarkina   +3 more
doaj   +1 more source

Effectiveness of Energy Transfer versus Mixing Entropy in Coupled Mechanical–Electrical Oscillators

open access: yesEnergies, 2022
Electrostatic energy harvesters convert kinetic energy into electrical energy via variable capacitors. Efforts to improve their power output are hampered by a lack of understanding of the fundamental limit for energy conversion efficiency.
Habilou Ouro-Koura   +3 more
doaj   +1 more source

Investigation of sluggish diffusion in FCC Al0.25CoCrFeNi high-entropy alloy

open access: yesMaterials Research Letters, 2021
To validate the ‘sluggish diffusion’ in high-entropy alloys, interdiffusion coefficients of individual elements and tracer diffusion coefficient of Ni were experimentally determined in FCC Al0.25CoCrFeNi alloy.
Abhishek Mehta, Yongho Sohn
doaj   +1 more source

Chaotic characteristics and mixing performance of pseudoplastic fluids in a stirred tank

open access: yesOpen Physics, 2023
The key for improving the mixing efficiency of pseudoplastic fluids is to enhance the chaotic degree in the flow field. The xanthan gum solution was used to study the chaotic characteristics and mixing performance in a stirred tank with the impeller of ...
Zhang Xiang   +3 more
doaj   +1 more source

Residual Entropy, the Third Law and Latent Heat

open access: yesEntropy, 2008
A novel thermodynamic treatment of residual entropy in crystals, involving the configurational partition function, is suggested, which is consistent with both classical and statistical thermodynamics.
Frank L. Lambert, Evguenii Kozliak
doaj   +1 more source

Entropy Generation Rates in Two-Dimensional Rayleigh–Taylor Turbulence Mixing

open access: yesEntropy, 2018
Entropy generation rates in two-dimensional Rayleigh–Taylor (RT) turbulence mixing are investigated by numerical calculation. We mainly focus on the behavior of thermal entropy generation and viscous entropy generation of global quantities with ...
Xinyu Yang   +4 more
doaj   +1 more source

Necessary Thermodynamics Factors to Obtain Simple Solid Solutions in High-Entropy Alloys from the Al-Ti-Co-Ni-Fe System

open access: yesArchives of Metallurgy and Materials, 2017
In this paper findings regarding the design and synthesis of High-Entropy Alloys based on mixing enthalpy, mixing entropy, δ parameter, Ω parameter and valence electron concentration are presented.
Górecki K.   +3 more
doaj   +1 more source

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